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Growth and properties of near‐UV light emitting diodes based on InN/GaN quantum wells
Author(s) -
Dimakis E.,
Nikiforov A. Yu.,
Thomidis C.,
Zhou L.,
Smith D. J.,
Abell J.,
Kao C.K.,
Moustakas T. D.
Publication year - 2008
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200778742
Subject(s) - electroluminescence , light emitting diode , molecular beam epitaxy , optoelectronics , quantum well , materials science , full width at half maximum , diode , quantum confined stark effect , monolayer , wavelength , epitaxy , ultraviolet , wide bandgap semiconductor , optics , layer (electronics) , nanotechnology , physics , laser
Near‐ultraviolet light emitting diodes (LEDs), based on one monolayer thick InN/GaN multiple quantum wells, were grown by radio‐frequency plasma‐assisted molecular beam epitaxy. The active region was grown at 685 °C, a temperature where the growth of thick InN layers is not possible. High resolution transmission electron microscopy revealed that the InN well layers were grown pseudomorphically in between the GaN barriers and were characterized by well defined interfaces and uniform thickness. The LED structures exhibited electroluminescence emission at 384 nm, with a FWHM of about 14 nm. The peak emission wavelength was independent of the injection current, indicating the absence of quantum confined Stark effect in these structures. Output optical power of 0.84 mW was measured at 200 mA in a bare die configuration. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)